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<?php |
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|
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namespace Invoker\ParameterResolver; |
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|
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use ReflectionFunctionAbstract; |
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|
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/** |
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* Dispatches the call to other resolvers until all parameters are resolved. |
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* |
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* Chain of responsibility pattern. |
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* |
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* @author Matthieu Napoli <[email protected]> |
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*/ |
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class ResolverChain implements ParameterResolver |
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{ |
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/** |
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* @var ParameterResolver[] |
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*/ |
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private $resolvers = array(); |
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|
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public function __construct(array $resolvers = array()) |
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{ |
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$this->resolvers = $resolvers; |
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} |
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|
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public function getParameters( |
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ReflectionFunctionAbstract $reflection, |
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array $providedParameters, |
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array $resolvedParameters |
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) { |
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$reflectionParameters = $reflection->getParameters(); |
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|
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foreach ($this->resolvers as $resolver) { |
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$resolvedParameters = $resolver->getParameters( |
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$reflection, |
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$providedParameters, |
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$resolvedParameters |
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); |
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|
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$diff = array_diff_key($reflectionParameters, $resolvedParameters); |
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if (empty($diff)) { |
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// Stop traversing: all parameters are resolved |
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return $resolvedParameters; |
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} |
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} |
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|
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return $resolvedParameters; |
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} |
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|
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/** |
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* Push a parameter resolver after the ones already registered. |
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* |
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* @param ParameterResolver $resolver |
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*/ |
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public function appendResolver(ParameterResolver $resolver) |
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{ |
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$this->resolvers[] = $resolver; |
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} |
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|
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/** |
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* Insert a parameter resolver before the ones already registered. |
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* |
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* @param ParameterResolver $resolver |
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*/ |
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public function prependResolver(ParameterResolver $resolver) |
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{ |
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array_unshift($this->resolvers, $resolver); |
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} |
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} |
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|
